What is the number of gold coins, each having a radius of 0.875 cm and a thickness of 2 mm, that need to be melted to create a cuboid with dimensions 5.5 cm × 5 cm x 3.5 cm? (Use ∏=22/7 )
A250
B175
C200
D225
A250
B175
C200
D225
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The diagonal of a square is . The diagonal of anothersquare whose area is doublethat of the first square is :